Zhang Yingcong, Cai Wenjuan, Wang Xianping, Li Jun, Yuan Wen, Sang Minghuang
J Opt Soc Am A Opt Image Sci Vis. 2021 Mar 1;38(3):344-349. doi: 10.1364/JOSAA.412916.
A hybrid optoelectronic bistability is realized with the assistance of an ultrahigh-order mode (UHM) excited in a symmetrical metal-cladding waveguide (SMCW). PMN-PT ceramics is selected as the guiding layer, which possesses the voltage modulated refractive index and thickness by means of an electro-optical effect and converse-piezoelectric effect. An amplified voltage signal translated from the intensity of reflected light is exerted on the guiding layer, whose parameter variations can alter the resonance condition of the UHM and finally lead to a dramatic change in the intensity of the reflected light. Since the full width at half-maximum of the UHM is extremely narrow, a hysteresis behavior with a milliwatt threshold between the incident light and the reflected light can be achieved when a positive feedback is established. Our bistability configuration is simple and not limited to TM polarization.
在对称金属包覆波导（SMCW）中激发的超高阶模（UHM）的辅助下，实现了一种混合光电双稳性。选择PMN-PT陶瓷作为波导层，该陶瓷通过电光效应和逆压电效应具有电压调制折射率和厚度。从反射光强度转换而来的放大电压信号施加在波导层上，其参数变化会改变UHM的共振条件，最终导致反射光强度发生显著变化。由于UHM的半高全宽极窄，当建立正反馈时，在入射光和反射光之间可实现具有毫瓦阈值的滞后行为。我们的双稳性结构简单，且不限于TM偏振。
